Depth-gage.



PATENTED' OG T. 6, NO3..

l No. 740,646.

H. o. HANSEN.

' DEPTH GAGE. AP-PLIGATIDN HLED JAN. s, 1903.

N0 MODEL.

. the shank of 'a screw d, on which is movable- UNITED STATES Patented October 6, 1903.

HANS C. HANSEN, OF NEWTON, MASSACHUSETTS.

DEPTH-GAG E.

SPECIFICATION forming part Gf Letters retenu No. 740,646, dated october 6. 1 903.

Application filed January 3, 1903. Serial No. 137,656. (No model.)

'parallelism between the face of a matrix and the bottom of a recess therein outlining a letter or character or for accurately testing for trueness any recess in any article or thing.

My novel depth-gage comprises a block on which are mounted a sight-gage and a feeler, the latter entering the recess and by contact with the bottom thereof indicating at the `sight-gage any variations in depth or any variations from parallelism between the bottom of the recess and the face of the matrix or other thing on which the sight-gage is mounted.

Figure l shows a matrix containing a recess and with my novel depth-gage sustained thereon. Fig. 2 is a longitudinal section of the same parts with the feeler occupying a position in another or deeper part of the recess.`

Fig. 3 is a view like Fig. `2, but with the feeler in yet another part of the recess-namely a shallower part; and Fig. 4 shows a modified form of gage.

The depth-gage comprises a body A, shown as having feet a, preferably pointed, said feet being shown as sustained on the face of amatrix or bloclr` G. The body sustains a sight.

gage, shown in Figs. l and 3 as comprising two levers l) c, the lever ZJ being shown as pivoted at b' on the body, while the lever c has its fulcrum at c' in an arm c2, erected on the lever b. The lever c receives the lower end of a check-nut d. The lever h has a hole in which -stands the upper end of a fceler e, which is held frictionally in the body A, as herein shown, by a friction device comprising a movl able blockf'and a springf'. The spring may be adjusted as to its strength by a screw f2,

the feeler'being so held that as the feet extending from the body are moved over the face of the matrix or block G the pointed end v of the feeler contacting with the bottom of the matrix will move the feeler freely vertically.

In Figs. Ito 3 the matrix G is represented as having a recess g, that may form part of an intaglio letter or other recess the bottom of which it is desired to measure as to depth or as to parallelism with the face 2 of the matrix or block G.

Viewing Fig. 1, let it be supposed thatv the lower end of the feeler contacts with the bottom of the recess at a central point, and in this position the sight-gage is fully closed, the portion 3 of the lever c at such timecontacting with the portion 4 of the lever b.

Fig. 2 shows the feeler as having been moved to the right from Fig. 1 down the inclined bottom of` the recess, and in so doing the weighted heavier right-hand end of the lever c, carrying the screw d and check-nut, by its contact with the upper end of the feeler is made to descend and follow closely the bottom of the recess. This movement of the feeler results in moving the sight-gage c away from the member?) thereof to leave a space 5, through which light may be seen, thusshowing that the bottom of the recess from the point where the feeler contacts therewith in Fig. lis out of parallelismwvith the face of the matrix.

Fig. 3 shows the feeler moved from the central position, Fig. l, to the left into a shal- -lower part of the recess. This position of the body causes the upper end of the feeler to be raised, and the shorter arm of the lever c of the sight-gage is lifted to close the free ends of the two levers b c and lift the left-hand end of the lowermost lever b, as shown in Fig. 3, to form aspace 6A between the under side of said lever and the upper side of the body A directly underneath.`

It will be obvious that the sight-gage would be moved to indicate the light-spaces at the end ofmembers of the sight-gage were the bottom of the recess g exactly parallel with the bottom of the matrix and the face 210 the matrix on which the feet of the body A rest were inclined with relation to the bottom of the recess.

Fig. a shows a modication of my invention wherein the matrix is sustained in a ball B, mounted to be tipped freely between the ICO testing-surfaces 2 and 3 at the upper ends of side plates, as fully shown in application Serial No. 85,889, filed December 14, 1901.

The gage shown comprises the body D, having mounted upon it at d2 a sight-gage d3. The sight-gage at the right of its pivot cl2 has, as provided for in Figs. 1 to 3, a screw and a check-n ut, and the body D has feet d4 d5, that stand' on the testing-surfaces. The feeler e in Fig. 4 is similar to that shown in Figs. l to 3, and it will be supposed, viewing Fig. 4, that the bottom of the recess 10 is parallel with the face 2 of the matrix G.

This invention is not limited to the particular shape shown for the sight-gage or whether made of one or a plurality of parts, so long as it is capable of indicating a line of light between the parts of the gage when the bottom of the recess in which the feeler rests is not of the depth desired or is not parallel to the face by which the body of the gage is sustained.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. Adepth-gage comprisin'ga body, asightgage pivoted thereto, a feeler movable by contact with the bottom of the recess to be measured at all points as to its depth, said feeler operating the sight-gage and an adjustingscrew carried by the sight-gage and adapted to contact with the feeler.

2. A depth-gage for determining the parallelism between the face of a matrix and the bottom of a recess therein, comprising a body having a sight-gage comprising a lever pivoted thereto, and va feeler to one side of the pivotal connection ofthe body and sight-gage to move the sight-gage on its pivot as the feeler is moved over the bottom surface of the recess, the said sight-gage carrying an adjusting-screw for contacting With the feeler.

3. A depth-gage for testing the trueness of la recess in an article, comprising a body movable over said article, a sight-gage carried thereby, said sight-gage including two pivotally-connected levers, one of said levers being pivoted also to said body, and a feeler adapted to project into a recess and be moved over the bottom surface thereof, said feeler operating the levers of the sight-gage.

4.' In a depth gage, a body, a sightgage carried by said body and comprising two pivoted levers, one of said levers being pivotally carried by the other of said levers, a feeler adapted to act upon said levers, and a screw feet to sustain thebody on the article having the recess to be measured or gaged, a sight-gage pivotally mounted upon the body, a feeler'to contact with the bottom of the recess in the article to move the sight-gage and an adjusting-screw carried by the sight-gage and adapted to contact with the feeler.

7. In adepth-gage for testing the trueness of a recess in an article, the combination of a body, a sight-gage comprising two levers, one of said levers being pivoted to the body and the other of said levers being pivoted to the first-mentioned lever, a feeler carried by said body and adapted to operate said levers.

8. In a depth-gage for testing the trueness of a recess in an article, the combination of a body, a lever pivotally mounted on said body, a second lever pivoted to the first of said levers, and a feeler operative on the second lever, said levers constituting a sightgage- 9. In a depth-gage for testing the trueness of a recess in an article, the combination of a body movable over the surface of the article to be tested, a lever pivotally mounted on said body, a second lever pivoted to the first-mentioned lever, and a feeler projecting loosely through the first-mentioned lever and acting on the second lever, said levers constituting a sight-gage.

In testimony whereof I have signed my name to this specication in the presence of loo two subscribing witnesses.

HANS C. HANSEN.

Witnesses:

GEO. W. GREGORY, EDITH M. SroDDARD. 

